Subtract 4/21 from 1/3
1/3 - 4/21 is 1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
1/3 = 1 × 7/3 × 7 = 7/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
4/21 = 4 × 1/21 × 1 = 4/21 - Subtract the two like fractions:
7/21 - 4/21 = 7 - 4/21 = 3/21 - After reducing the fraction, the answer is 1/7
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